Model yacht



NOV. 6, v H WALLENBERG .I MODEL YACHT Filed Sept. l5, 1948 y 2SHEETS-SHEET 1 Nov. 6, 1951 v. H. WALLENBERG 2,573,745

MODEL YACHT Filed sept. 15, 1948 2 SHEETS-SHEET 2 Patented Nov. 6, 1951vUNITED STATES PATENT OFFICE MODEL YACHT Victor Henri Wallenberg,Stockholm, Sweden Application September 15, 1948, Serial No. 49,393

s claims. (ci. 1144+323) .r This invention relates to a model yacht andmore particularly to a model yacht of catamaran type, consisting .of avlongitudinal .supporting ele- .lmentand two identicalpontoons fastenedto said supporting element on either side, further sup- A similar modelyacht is disclosed-in the patent application Serial No. U. S. 22,420,led April `2.1, l948,.now abandoned. The present inven- `.tion relatesto further improvements of thepro-l posed new model yacht.

A purpose of this inventionv is to provide a model yacht at a low costresulting from the fact that each part of same is so constructed that itis suitable for mechanical manufacture and thatvthe yacht is composed offew parts.

Another purpose is to provide a light but nevertheless. large modelyacht, in order Ato attain speed and rigidity.

Y Another purpose is to provide a model yacht Awhich can be disassembledinto separate components and which is easily and quickly assembled andstripped as well as trimmed and in disassembled condition can be carriedin an ordinary portfolio or small hand bag. Certain parts are intendedto be supplied permanently .mounted while other parts are intended to be.mounted for each sailing with a view to creating la hobby article,which is interesting for the purchaser to assembly and disassemble.Moreover, the components of the yacht are so designed that y,no toolsare required for assembling.

Another purpose is to provide a model yacht sailing at least as well asa model yacht of the ordinary design and of the most expensive kindwithD the same sail area.

Still another purpose is to provide a model yacht which may bemanoeuvred with greater ease than ordinary model yachts. y g

A number of important details of construction will be described below:

Figl 1 shows a longitudinal viewV of a design of my model yacht.

Fig. 2 shows the model yacht seen fromY above,

without the rig mounted thereon.

Fig. 3 shows-in a larger scale-a front view ,of a pontoon.

Fig. 4 showsalso in a larger scale-a detail of :a fastening device forthe mast of the model Fig. 5 showsalso in a larger scale-the lower ,partof the mast turned 90 as compared with Fig.v 4.

, Fig. 6 shows-also in a larger scalethe chain plate of the mast.

Fig. '7 shows-also in a larger scale--the upper lfastening device forthe stays of the mast and the shrouds ofthe foresail.

Fig. V8 shows-also in a larger scale-this fastening device seen fromabove.

Fig. 9 showsf-also in a larger scaledetails of the lower `fasteningdevice for the foresails Vshroud and the iront fastening devicerespectively for the foresails boom. p

Fig. 10 `shows-also lin a larger scalethe ymanuvring device for thecenterboard of the Y-model .yacht in a turned down position.

Fig. 1l shows-also in a larger scalea detail o f the manuvring deviceshown in Fig. l0 in its position when the centerboard is lifted.

The supporting frame ofthe model yacht consists of two longitudinaltubes I which are `squeezed together at their ends ,and drilledsupporting frame. parts I0, II, one of which, I0, is inserted by means yof a plug I2 in the end of the other one, I I.

through at the squeezing points 2, so that crosswise extending pins 3, 4can be inserted through ,means of nuts 6 on the inner sides of the tubeends. g On the outer ends of the bow pin the fastening eyes 8 of thepontoons 'I are placed, which are held in position by means of wing-nuts9. In Vthis way tubes I and pins 3, 4 together form a The tubes.V aremade in two The tubes can thus be taken apart and carried in a smallhand bag or portfolio.

lThere are holes in the tubes for inserting the chain plate or shroudpin I3, which extends a sufcient distance outwardly of the tubes to beused for attaching the mast shrouds I4. Shroud pin I3., is preventedfrom sliding sideways by shoulders I5. In addition to this, there areholes at the inner sides of the tubes for inserting the keel *shaft I6,on which the keel or centerboard II is suspended. This suspensionpermits easy installation and removal of the keel. The outer I sides ofthe frame tubes I support the keel shaft n`4 IIi,-` preventing it frombeing pushed sideways.

VGenterboard I1 can be swung on its shaft I6 in a longitudinaldirection.` Suitably two or more holes are `.arranged successively forthe shroud on Vthe thicker middle tube.

3 pin and keel shaft, in order to permit trimming of the mast I8 andkeel I1 in relation to each other.

Each pontoon 1 consists of rubber cloth vulcanized together to form atube with fastening yokes I9 vulcanized in, by means of which thepontoon ends are connected to the pins 3, 4. The vulcanized-in part 2i)of fastening yoke I9 is bent tov the shape of a circle, and the ends 2|of the cloth, which are to be vulcanized to these yoke parts, are cut toform tapering ends 22 which, moreover, are curved downwards in bow shapetowards the stern. The upper part I9 of the pontoon yokes, as will beseen, is bent rearwardly towards fasteners 2 on the supporting' tubesand there forming fastening eyes 8. To each pontoon tube 1 a valve 23 isattached, for instance an ordinary bicycle type valve, by means of whichthe pontoon tubes can be inated. Alternatively the pontoon tubes can beinflated by means of simple valves such as those used on toy balloons.When inated, the pontoons are stiifened and carry the supporting frame,the longitudinal tubes of which in their turn serve to stay thepontoons.

,When the. model yacht is taken apart, each pontoon can be rolled on oneof the end yokesafter the air is let out-and made into a package, whichdoes not require much space.

The mast I8 as shown consists of three tubes 24, 25, 26, which permitsconvenient packing. The middle tube 25 is made a little thicker than theother tubes 24,v 26, which are inserted into the ends of the middle tubeagainst their stops 21 (-Fig. 7). The lower mast tube- 26 is supportedby a carrying pin 28, the` ends of which 29 are bent to grip aroundtubes I on the supporting frame. .The carrying pin has in the middle adownward bend 30, and the lower part of the -mast is tapered as at 3I topermit the mast to 2.4, 25' of the mast, the mainsail has a recess 35,

into which a disc 36- is inserted after the top tube 24 has beenseparated from the thicker tube 25. Disc 36A is provided with a hole 31having the same diameter as the top tube, which results in'y thediscbeing held by the top tube and resting The disc is also provided with apair of holes 38 for receiving the shrouds I4 and a peg pointingupwards-39'-for fastening the forestay and the foresail. The

foresail 4I] has a shea-th 4I, through which a stay 42 is pulled, whichat the lower end is shaped to form a hook 43, intended to be hooked tothe fastening yoke formed on bowpin 3. The top end of forestay 42 isalso shaped to form a hook 44', to which is attached a wire 45, by meansof which the forestay isattached and fastened by a few half-hi'tches 46Y(Fig. 7) around peg 39 of disc 36. The same wire is then put around ahook 41 at the top` of the foresail and is again fastened by a fewhalf-bitches around peg 39, while the foresail is stretched. Theforesail boom 48, which rests in a sheath at the foot edge`49 of theforesail, has at its front end a hook 5U, which is attached to yoke 5 ofthe bow pin 3. Hook 50 forms also an eye 5I for the foresail sheet 52which, in addition to this, is attached to another eye at the rear end53 of the boom, so that these two eyes are connected by means of thesheet. On this fixed part of the sheet there is arranged a movablestretcher 54, of rubber for instance, to which the rear end 55 of thesheet is attached after having passed down through an eye 56, formed onan elastic hook, which in its turn is Ithreaded on a lee-fang 51'.Lee-,fang 51 consists of a bent wire, which at its ends forms eyes 58,threaded on mast carrying pin 28. The eyes rest against the supportingframe so that the wire isheld stretched between the tubes I oi theframe.

When taking down the rig, the foresail can be rolled on its boomvtogether with the sheet, after the forestay has been loosened and takenout of the front edge sheath.

The boom 59 of mainsail 33 rests also in a sheath at the foot edge 6U ofthe mainsail and is at its front end tted with an eye 6I threaded onmast I8 and shaped of a wire, which, in addition ot this, is bent toform another eye 62. Through this eye 62 the fore end 63 of the mainsailsheet is threaded` and by means of a stretcher 64 adjustably fastened toa partv 65 of the mainsail sheet passing through an eye 66 at the top ofa hook 61 attached to keel I1. Hook 61 is hooked into' a hole 68 on thekeel. This part 65 is in its turn either fastened to stern pin 4 bymeans of a hook 69 and also threaded through the spiral-shaped part 10of the spring on a clothes pin or similar 1I, or only threadedthroughthe hook 61 and fastened to the clothes pin. This clothes pin`vis clamped around a' point on boom 59 of the mainsail, which issuitable' with regard toy sailing. conditions.v

Thev lmainsail can be rolled around its boom after the sheet has beentaken oi the stern pin, and the keel hook off the keel.

The sails are shown sewed on strengthening ribs 8I of, for instance',vsuitable plastic.

Fig. l0 shows, as already mentioned, the keel in its lowered position,as used when heating. The function of the keel is then tov move thecentre of leeway resistance with the aid of the' wind pressure of thelmainsail. For Wind aft sailing thekeel is tov be pulled up, and at thesame time the stern hook 69 of the mainsail sheet is loosened, so' thatthe mainsail swings out. The mainsail sheet 65 is thenno longer with itshook -61 influencing keel I1. Pulling up the keel' is effected by thefollowing arrangement. In another hole in the keel, 687, there is a hook12 attached.

f which at itsouter end forms an eye 13. On stern pin Ilv there isanother hook 14', consisting of a wire first bent to U-shape, with onepart of same, 115, bent to form a yoke 16, and at the free end bent toform an eye 11', which is fastened to eye 'I3 of keel hook 12. The otherpart is at its free end bent to form a catchl peg 19 in front of yoke16?. When hook 14 rests on stern pin 4 with the upper part of its loop,hook 1'2 will not influence the keel.. If the hook is pulledrstern-wards past the bendY to yoke 16, whenI catch 19 prevents hookingorf and is released, the yokeis attached to stern pin r4 (Fig. 11). Bythis movement hook 'I2 is pulled sternwards and thus the keel to' theposition shownV by dotted line 88 in Fig. 10. For lowering the keel,hook 14 can be easily returned to its previous position. As the keel hasa row of holes 68, |68', for hooks 61 and 12, trimming can be effectedfor various conditions. The ends of hook 61 may also have'backwardlybent catches to fasten the lifted keel to pin 4 or elsewhere.

tected material.

With regard to the material selected for various employed. The tubes ofthe supporting frame as well as the parts of the mast can be made ofaluminium or some other rustproof or rust-pro- Shrouds, stays and hooks,eyes etc. as well as bow and stern pins, keel shaft and carrying pin forthe mast can be made of stainless steel wire.

The centerboard, which can be swung in the plane of symmetry of theyacht, is a means for automatically keeping a given course in spite of fvariations in wind pressure when sailing. Good course balance is alsoattained for the intensity vof -wind prevailing when sailing. Withoutcomplicated devices a previously not available possibility is obtainedto change completely from beatf ing to sailing before the wind, and tomanuvre from-tasking to wind aft sailing and vice versa,

by means of a simple manipulation, i. e. by moving hook 'l and changingover the mainsail.

What I claim is:

l. A model sailing yacht, comprising, a pair of inflated collapsiblepontoons disposed in side by side spaced parallel relationship, alongitudinal frame member for each pontoon removably secured theretoadjacent each end, relatively rigid bow and stern cross membersdetachably connecting said frame members and said pontoons in spacedparallel relationship, a cross bar connecting said frame membersintermediate the ends thereof, a keel mounted on said cross bar for foreand aft pivotal movement and extending below said pontoons, a secondcross bar mounted on said frame members for movement in a fore and aftdirection and forming a mast step, means to secure said second cross barin adjusted position, a sectional mast stepped in said second cross bar,shrouds secured to an intermediate point on said mast and to said framemembers, a foresail shroud secured to an intermediate point on said mastand to said bow cross member, a foresail supported by said foresailshroud and having a foresail boom received in a tubular portion adjacentthe foot thereof, a, foresail sheet connected to said foresail boom andslidably connected to said second cross bar, means to adjust the lengthof said foresail sheet whereby said foresail may be trimmed, a mainsailhaving a tubular portion adjacent the peak thereof received over theupper section of said mast and supported thereby, a main boom receivedin a tubular portion at the foot of said mainsail, a main sheetdetachably secured to said main boom for adjustment in a fore and aftdirection and adjustable exible means connecting said mast, said keeland said main sheet whereby upon movement of said second cross bar saidkeel will be pivated in a fore or aft direction to balance said yachtand said mainsail will be trimmed.

2. A model sailing yacht as dened in claim 1 in which said frame memberscomprise sectional tubes and in which the parts may be disassembled, thepontoons deflated and folded, and the complete yacht packed in arelatively small space.

3. A model sailing yacht as defined in claim 1 in which additional meansis provided to adjust said keel for sailing before the wind or on thewind, said means comprising a flexible member connected to said keel anda hook hav- Instead of vulportionsLv for engagingr said whereby saidkeel maybe ing two connecting stern cross member raised or lowered.

4. A model sailing yacht as defined-in claim l, in which the means tosecure said second cross `bar v,in adjusted position comprises `aresilient ring received on each frame member on eachside ,ofsaid secondcross bar.`

5. A model sailing yacht comprising a pair of pontoonsdisposed in sideby side relationship, a

longitudinal frame member for each pontoon secured thereto adjacent eachend, bow and stern Ycross members connecting said frame members and saidpontoons in spaced parallel relationship, a cross bar connecting saidframe members intermediate the ends thereof, a keel mounted on saidcross bar for fore and aft pivotal movement and.. extending below saidpontoons, a second cross bar mounted on said frame members formovementin a fore and aft direction and forming a mast step, means tosecure said second cross bar in adjusted position, a mast stepped insaid second cross bar, shrouds secured to. an intermediate point on saidmast and to said frame members, a, foresail shroud securedto anintermediate point on saidmast and to'said bowcross member, a foresailsupported by said foresail shroud and having a foresail boom received ina tubular portion adjacent the'foot thereof, a foresail sheet connectedto said foresail boom and slidably connected to said second cross bar,means to adjustv the length of said foresail sheet whereby said foresailmay be trimmed, a mainsail having a tubular portion adjacent the peakthereof received over the upper portion 'of said mast andsupported'thereby, a main boom received 'in a tubular portion atthejfoot of said mainsail, a main sheet detachably secured to said mainboom for adjustment in a fore and aft direction and adjustable flexiblemeans connecting said mast, said keeland said main sheet whereby uponmovement of said second cross bar said keel will be pivoted in a fore oraft direction to balance said yacht and said mainsail will be trimmed.

6. A model sailing yacht comprising a pair of pontoons disposed in sideby side spaced parallel relationship, a longitudinal frame member foreach pontoon secured thereto adjacent each end, bow and stern crossmembers connecting said frame members and said pontoons in spacedparallel relationship, a keel supported on said frame members for foreand aft pivotal movement and extending below said pontoons, a cross barmounted on said frame members for movement in a fore and aft directionand forming a mast step, means to secure said cross bar in adjustedposition, a mast stepped in said cross bar, shrouds secured to anintermediate point on said mast and to said frame members, a foresailshroud secured to an intermediate point on said mast and to said bowcross member, a foresail supported by said foresail shroud and having aforesail boom received in a tubular portion adjacent the foot thereof, aforesail sheet connected to said foresail boom, and slidably connectedto said cross bar, means to adjust the length of said foresail sheetwhereby said foresail may be trimmed, a mainsail having a tubularportion adjacent the peak thereof received over the upper portion ofsaid mast and supported instable:

means connecting said mast, said keel and. said main` sheet whereby uponmovement of said cross bar said keel will be pivoted. inA a Afore or aftdirection to balance said yacht and said mainsail. will be trimmed'.

7l.Y A model` sailing yacht comprising a pair of pontoons disposediinside by side spaced rela tionship, a longitudinal frame member foreach pontoon secured thereto adjacent eachend, bow and stern crossmembers connecting said frame members and said pontoons in spacedrelation ship, a keel supported on said frame members for fore and aftvpivotal movement and extending be- 'lOW Sad pOnbDOnS, a. crops bammounted on said frame members for movement in a fore and aft directionand forming a mast step, means tosecure said cross bar in adjustedposition, a mast stepped in saidv cross bar, shrouds secured to anintermediate point onsaid mast and to said frame members, a foresailshroud secured tol an intermediate point on said mast and to said bowcross member, a foresail supported by the said foresail shroud, aforesail sheet connected to said foresail and slidably connected to saidcross bar, means to adjust the length of said foresail sheet `wherebysaid foresail may be trimmed, a mainsail supported by said mast, a mainboom secured to said mainsail, a main sheetl detachab'ly secured to saidmain boom forY adjustment in a fore and aft direction and adjustablemeans connecting said mast, said keel, and said main sheet whereby up'onmovement of' said cross bar said keel will be pivoted in a fore or' aftdirection to balance said yacht and said mainsail will be trimmed.

8. A model sailing yacht comprising a pair of pontoons disposed in sideby side relationship, a longitudinal frame member for each pontoonsecured thereto adjacent each end, bow and stern cross membersconnecting said frame members and said pontoons in spaced relationship,a keel supported on. said frame members for fore and aft pivotalmovement and extending below said pontoons, across bar mounted on saidframe members for movement in a fore and aft direction and forming amast step, means to secure said crossl bar.` in adjusted position, lamast stepped in said cross bar, shrouds secured to an intermediate pointon said mast and to said frame members, a foresail shroud secured to anintermediate point on said mast and to said bow cross member, foresailsupported by said foresail shroud, a foresail sheet connected to saidforesail andslidabl'y connected to said cross bar, a mainsail.Vsupported by said mast, a main boom secured to said. mainsail, a mainsneet detacha-bl'y securedv to said main boom and adjustable meansconnecting said mast, said keel and said main sheet whereby uponmovement of said cross bar said keel will be pivoted in a fore or aftdirection to balance said yacht and said mainsail will be trimmed.

VICTOR HENRI WALLENBERG.

REFERENCES CTED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 36,099" Mallory Aug. 5, 1862189,459 Herreshoff Apr. 10, 1877 210,573 Spooner Dec. 3, 1878 1,336,226Hart Apr. 6, 1920 1,449,274 Erickson Mar. 20, 1923 2,065,715 Leon Dec.29, 1936 2,140,250 Schlumpf Dec. 13, 1938 2,351,542 Pauli` June 13, 1944FOREIGN PATENTS Number Country Date 611,907 Germany Apr. 9, 1935

